The Football Association has charged Liverpool forward Luis Suarez with violent conduct for biting Chelsea defender Branislav Ivanovic.
The incident occurred in the 74th minute of Sunday's 2-2 draw at Anfield, in which Suarez went on to score a 96th-minute equaliser.
Suarez could face an extended ban after the FA claimed the standard three-match ban for violent conduct was "clearly insufficient".
An FA statement read: "The FA has charged Liverpool forward Luis Suarez with violent conduct. The charge follows an incident with Chelsea's Branislav Ivanovic in yesterday's fixture at Anfield [21 April 2013]. The incident was not seen by the match officials and has therefore been retrospectively reviewed.
"It is alleged that the conduct of Suarez constitutes violent conduct and it is the FA's contention that the standard punishment of three matches that would otherwise apply is clearly insufficient in these circumstances. Suarez has until 6pm on Tuesday 23 April to respond to the charge, thereafter an Independent Regulatory Commission will be convened this Wednesday, 24 April."
Liverpool have pledged not to sell the Uruguay international after his latest transgression, despite many commentators suggesting they should offload a player who had brought more than his fair share of controversy.
The 26-year-old has been fined - with the player requesting the money goes to the Hillsborough Family Support Group - but that will be the extent of the club's discipline. Suarez, however, has been told that there cannot be any repeat offences and that he must change his behaviour on the pitch.
Asked whether the incident would have any effect on the player's future managing director Ian Ayre, who has liaised with owners Fenway Sports Group over the last 24 hours, told liverpoolfc.com: "No, not at all. It affects his future in the sense that we have to work with him on his discipline - but Luis is a very important player to the club.
"He signed a new four-year contract last summer and we'd all love to see him here throughout that contract. He's a fantastic player, top scorer and everything we'd want in a striker, so there's no change there.
"This is more about getting him back on the right track and it's largely down to (manager) Brendan (Rodgers) now to work with him on that side of his character, Brendan will be working with him further on his discipline."